TOEFL Mini-test (Skills 6-8)

“Although neural theories” correctly introduces a contrast clause. “Although” is a subordinating conjunction used to show contrast between ideas. Other options either lack connectors or are grammatically incomplete. Using correct conjunctions helps express complex relationships clearly.

“When a home is bought” is correct because it includes both a connector and a complete passive clause. Other options lack either a verb or proper structure. Conditional clauses must include both subject and verb for clarity and correctness.

“But their” correctly connects two independent clauses showing contrast. The first clause introduces the action, while the second adds a limiting condition. Other options either lack proper connection or express incorrect relationships. Using correct coordinating conjunctions ensures logical flow and clarity in compound sentences.

“The superintendent did not want the story published” is correct because it provides a complete clause explaining the reason. Other options lack proper structure or subject-verb agreement. A reason clause must include a subject and verb to clearly explain the cause of the action.

“An extraordinary number” is correct because the clause already contains a verb (“occurred”), so only a subject is needed. Other options include unnecessary verbs, creating redundancy. Proper clause construction requires avoiding repeated verb structures for clarity.

“As pumps have” correctly introduces a cause-effect relationship. “As” functions as a connector showing reason. Other options either lack a connector or use incorrect structure. Proper use of subordinating conjunctions ensures logical relationships between clauses.

“Yet they are” is correct because it provides both a connector and a subject-verb pair. The sentence requires contrast and a complete clause. Other options are incomplete or lack necessary elements. Proper clause structure ensures clarity and grammatical correctness.

“Target since monarchs” correctly provides a connector and subject to complete the clause. The sentence requires a logical connection explaining behavior. Other options either lack connectors or introduce incorrect verb agreement. Proper clause linkage ensures meaning is clear.

“In that” is correct because it introduces a reason or explanation. The sentence explains why the chromosome is unusual. Other options express different relationships such as addition or result. Choosing the correct connector ensures clarity and logical meaning.

“It is” is correct because the clause requires both subject and auxiliary verb to support the passive structure “is blocked.” Other options either lack verbs or introduce incorrect connectors. Proper auxiliary usage ensures grammatical accuracy in passive sentences.